The Year's Best Science Fiction, Vol. 20

Study your history. It tells you that travel always brings its share of hazards; that’s a basic, impatient law of the universe. Leaving the security and familiarity of home is never easy. But every person needs to make the occasional journey, embracing the risks to improve his station, his worth and self-esteem. Procyon explains why this day is a good day to wander. She refers to intelligence reports as well as the astrological tables. Then by a dozen means, she maps out their intricate course, describing what she hopes to find and everything that she wants to avoid.

She has twin sons. They were born four months ago, and they are mostly grown now. “Keep alert,” she tells the man-children, leading them out through a series of reinforced and powerfully camouflaged doorways. “No naps, no distractions,” she warns them. Then with a backward glance, she asks again, “What do we want?”

“Whatever we can use,” the boys reply in a sloppy chorus.

“Quiet,” she warns. Then she nods and shows a caring smile, reminding them, “A lot of things can be used. But their trash is sweetest.”

Mother and sons look alike: They are short, strong people with closely cropped hair and white-gray eyes. They wear simple clothes and three fashions of camou flage, plus a stew of mental add-ons and microchine helpers as well as an array of sensors that never blink, watching what human eyes cannot see. Standing motionless, they vanish into the convoluted, ever-shifting background. But walking makes them into three transient blurs-dancing wisps that are noticeably simpler than the enormous world around them. They can creep ahead only so far before their camouflage falls apart, and then they have to stop, waiting patiently or otherwise, allowing the machinery to find new ways to help make them invisible.

“I’m confused,” one son admits. “That thing up ahead-”

“Did you update your perception menu?”

“I thought I did.”

Procyon makes no sound. Her diamond-bright glare is enough. She remains rigidly, effortlessly still, allowing her lazy son to finish his preparations. Dense, heavily encoded signals have to be whispered, the local net downloading the most recent topological cues, teaching a three-dimensional creature how to navigate through this shifting, highly intricate environment.

The universe is fat with dimensions.

Procyon knows as much theory as anyone. Yet despite a long life rich with experience, she has to fight to decipher what her eyes and sensors tell her. She doesn’t even bother learning the tricks that coax these extra dimensions out of hiding. Let her add-ons guide her. That’s all a person can do, slipping in close to one of them. In this place, up is three things and sideways is five others. Why bother counting? What matters is that when they walk again, the three of them move through the best combination of dimensions, passing into a little bubble of old-fashioned up and down. She knows this place. Rising up beside them is a trusted landmark-a red granite bowl that cradles what looks like a forest of tall sticks, the sticks leaking a warm light that Procyon ignores, stepping again, moving along on her tiptoes.

One son leads the way. He lacks the experience to be first, but in another few weeks, his flesh and sprint-grown brain will force him into the world alone. He needs his practice, and more important, he needs confidence, learning to trust his add-ons and his careful preparations, and his breeding, and his own good luck.

Procyon’s other son lingers near the granite bowl. He’s the son who didn’t update his menu. This is her dreamy child, whom she loves dearly. Of course she adores him. But there’s no escaping the fact that he is easily distracted, and that his adult life will be, at its very best, difficult. Study your biology. Since life began, mothers have made hard decisions about their children, and they have made the deadliest decisions with the tiniest of gestures.

Procyon lets her lazy son fall behind.

Her other son takes two careful steps and stops abruptly, standing before what looks like a great black cylinder set on its side. The shape is a fiction: The cylinder is round in one fashion but incomprehensible in many others. Her add-ons and sensors have built this very simple geometry to represent something far more elaborate. This is a standard disposal unit. Various openings appear as a single slot near the rim of the cylinder, just enough room snowing for a hand and forearm to reach through, touching whatever garbage waits inside.